as const: the most underrated TypeScript feature

'as const' is an amazingly useful TypeScript feature that most people still don't know about. 00:00 SO underrated 00:12 Objects are mutable! 01:54 How as const works 02:38 Object.freeze 03:19 Deriving types from as const 04:30 keyof typeof Become a TypeScript Wizard with my free beginners TypeScript Course: https://www.totaltypescript.com/tutorials/beginners-typescript Follow Matt on Twitter https://twitter.com/mattpocockuk Join the Discord: https://mattpocock.com/discord